Paper-bag machine



(No Model.) 3 sheetssheen 1. W. A. LORENZ 8u W. 1-1. HONISS.

PPER BAG MACHINE.

Patented'rDec. 1, 1885.

aah- Y 211111111- 1| lillhun L W'nesses z JW @Ma @MQ/ rl. PETERS. Phma-Liehpgupner. wnhingm DI.

(No Model.) 3 she'ecswsheet 2.

W. A. LORENZ 8a W. H. HONISS.

Inventor N. PETERS. FhmwLahugnphc-r. wuhingmn. D. C.

(No Model.)

3 Sheets-Sheet 3. W. A. LORENZ & W. H. HONISS.

PAPER BAG MACHINE.

VILLIAM A. LORENZ AND W'lLLlAllI H. HOlllSS, CF l-lARTFCl-D, CCNNECTI CUT, ASSlGNCRS TC FELlX W. LEINBACH AND CLARENCE A YOLLE, BCTH PAPER-Effi@ ltlACHlN.

. wart os" .Letters Patent No. 331,721, dried .December l, 1885.

Application filed July 1G. 1583. Serial Xo. 1,110,972. (Xo model.)

To all 107mm may concorre/r 13e it known that we, Ximian A. LORENZ and winmix il. Homes, citizens of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented new and useful improvements in Paper-Bag Machines, ol which the following is a speciiieation.

Uur invention relates to improvements in io paperbag machines for i'orining a continuous tucked tube from a roll oi' paper, the object being to produce a tube of nniiorm and unvarying with tucks ot' even depth, and with unbroken corners, and with a centrally l pasted lap, :is nearly perfect as possible, and

to provide i'or these results by the use of airY pressure. and by the assistance of guiding and forming devices. We attain these objects by the mechanisms illustrated in the accompanying drawings, in Which- Figure 1, Sheet 1, represents a crossscction oi' a tucked tube. Fig. 2 is a side View oi' our improved tube-i`orniing mechanism complete. Fig. 3 is a plan of the same. Fig. 4 is a seetion of the `former at the lino a b of Fig. 2, looking in the direction ofthe arrow c. Figs. 5, (3, '7, S, and 9 are sections at the lines l e, j' g, /L 'z'. j 7e, and Zin, respectively, of Fig. 2. Fig. 1G, Sheet 2, represents a side View of a 3o modification of the tube-forming device. Fio'. 11 isa plan oi' the sa ie. Fig. 12 is a section of the device at the line 'a 0 of Fig. 10, showing the air-box opened up. Fig. 13 is a section of the former at the line p q of Fig. 10, showing the guiding-rods and part oi' the apron. Fig. 1-1, Sheet 3, a side view of another modiiieation ofthe tube-forming device. Fig. 15 is a plan of the same. Fig. 1G is a cross-section thereof on the line i' s ol' Fig. 1.1. 4o Fig. 17 is a section of another modilication ot' the tube-forming device.

Similar letters rei'er to si niilar parts throughout the several views.

1n Fig. 1, Sheet 1, is shown a section of a .i5 tucked tube in which 1 2 are the tucks, and the lap whereY the tube is joined by paste.

1n Figs. 2 and 3 the frame-work ol' the inachine is shown at d, in which is mounted a roll of paper, 5, on shaft G. This paper is passed over a roller, T, where a pasteroller, 5o 8, receiving paste iroin a dish, 9, deposits a line of paste near one edge of the paper, as indicated by the cross-hatched line 10. From the roll 7 the paper passes up an inclined apron, 11, which is tapered and reduced in width as it approaches the box-shaped part 12 of the forming device, or former as itis technically termed. The tapering sides 18 and 14 ot' the apron 11 are rounded alittle, allowing the paper to pass over without breal 6o ing its surface. At the junction of the apron 11 and the box part 12 of the former the snrface is rounded, as seen at 15 in Fig. 2, and also at the sides, as seen at 1G and 17 in Fig. 3, While the edges of the meeting surfaces or corners ol' 15, 15, and17 are rounded alittle.

ln the corners 16 and 17 are placed rollers 18 and 19 in fixed stands. (Shown only in Fig. 2.) rFliese rolls are preferably placed at an angle to direct the course of the paper dowir 7c, Ward; but they may be placed vertically. The function of these rolls 1S and 19 is to pass the paper from the apron 11 to the sides of the box-shaped part 12 of the former without breaking a sharp crease in the paper, and also to deline, by means of the lower edges of the two rolls, both the lower corners of the box part of the tube. (Seen better at 22 and 23 in Fig. 4.) This delining ot the lower corners of the tube allows the paper to be drawn to- 8o gether under the former by the assistance of a Jrocking-iu roll, 2d, set preferably at an angle, as seen at 21 in Fig. 5, rand also by the assistance ot' two guide-rolls, 25 and 26, which 'are mounted on springs. (Shown only in Fig. 2.) S5 The two guide-rolls are` set preferably at an angle to direct the course ofthe paper inward. The two edges of the paper lap over one another in front of the springinounted roll 27, which presses and unites the laps by means 9o of the line of paste 10. 'We have thus produced a box-shaped tube with rounded corners. (Seen more clearly in Fig. o in section.) Commencing atthc line j" g, the former is altered in shape, being reduced in thickness (see Fig. 2) by the converging of the upper and lower suii'aces,wheie plates 2S and 29 are used. These latter keep the full width of the box part 12 of the former, as seen in Fig. 3. Between the plates 28 and 29 the sides of the former are tapered from the box part 12 at linef g to the end of the former at line lm, as seen at 3() and 3l, Fig. 3, thus forming recesses. The bottoms of these recesses are flat surfaces preferably, but may be concave in shape, or may be cutaway farther in. The paper tube, when pasted together in the box shape, is now passed on the converging plates 28 and 29, and the sides ofthe tube are directed into the recesses at either side ofthe former to produce the tucks, and then the tube is passed between a pair of drawingrolls, 32 and 33.

In order to hold the paper to the former and produce tricks of unvarying depth, we utilize airprcssure in the following manner: The former is provided with a pipe, 34, or may be hollow throughout its entire length.

- This pipe 34 communicates at one end with the tuck-recesses by means of openings 35 and 36, and at its other end with a pipe, 37, connected to an exhaust-fan, 33, driven by a belt, 39, from pulley on shaft 41. By the motion of the fan 38 a partial vacuum is created in the tuck-recesses, causing the outside airpressure to hold the paper closely to the former all along the tuck-recesses, and it will cause the paper tube to be delivered to the drawing'rolls with uniform depth of tucks.

The mannerin which the paper keeps to the former is illustrated in Figs. 7, 8, and 9. The plates 28 and 29 are curved at 42 and 43, Fig. 2, to prevent creases forming in the paper as the tube passes from the box part 12 of the former to the converging part. The edges of the plates are rounded, as seen at 44 and 45, Fig. 7. The front ends of the plates are cut out, as seen at 46 and 47, Fig. 9, to allow the bottom of the tucks to assume a rounded shape. If preferred, these rounded edges may be broken into sharpercorners and ilattened by the drawing-rolls. )Wien the line of paste 10 approaches the tuckiug-in roll 24, the paper, with its pastc,is liable to sag and deposit paste on the roll. To prevent this,a small hole, 48, is made in the former 12 over the roller 24, which hole communicates with the vacuumchamber 34, causing the paper to keep up against the former.

Figs. 10 and 11, Sheet 2, show a modifica tion ofthe tube-forming device employing airpressure exerted outside of the tubeeformer to form the tucks. Herein the former 50 is constructed in a different manner than the boxshaped former 12 in Figs. 2 and 3, Sheet 1. The upper and lowersu'rfaces, 51 and 52, Fig.

` 10, Sheet 2, are curved or bowing, while the tuck-recesses 53 and 54 in the sides of the former extend about two-thirds the length of the former, and are rounded, as seen in section in Fig. 12. The paper from roll 5, Fig. 10, is passed around a roller, 7, and receives a line of paste, 10, in a similar manner before illustrated, and the paper then passes upon the apron 11, being guided from thence to the former proper by guiding rods 55 and 56. (Shown also in Fig. 13.) The edges of the paper are then lapped infront of the presser-roll 27, and are `joined, as before described, a guiding-finger, 65, serving to tuck in the inner lap of paper.

Extending along about two -th'irds of the length of the former 50, and encircling it, is shown an airbox made in halves 57 and 58. (Shown opened in Fig. 12.) VThis air-box is hinged at 59 and 60, and is clamped together by hooks 61 aud 62. The box does not touch the former 50 at the ends, and in order to make a partially air-tight joint elastic strips 63 and 64, of leather or other materiahare fastened to the box 57 and 58, which strips bear upon the paper passing over t-he former. A pipe, 70, communicating with a fan (not shown) leads to the air-box. A blast of air forced into the air-box compresses the air therein and forces the paper to keep closely tothe former all along the tuck-recesses within the box, as at 53 and 54. A part of the compressed air may escape near the drawi ug-rolls 32 and 33, though the paper tube may be inclosed fully up to the drawingrolls. The box is hinged, and is made in halves to get at the paper and start it upon the former through the box when commencing to operate the machine.

)Vhile it is preferable to form the paper into a box or tube shape and paste its laps together before passing it to the tuck-recessed part of the former, we find by experiment that the lapping and pasting together can be done a little beyond the box-shaped part of the former without affecting the accuracy of the tube.

)Ve have described in the foregoing the formation of atucked tube around the outside cfa former by the use of air-pressure and other devices.

By a'moditcation of the former we attain the same object in the following manner: Referring to Figs. 14and 15, Sheet 3, the paper roll- 5, roller 7, apron 11, guide-rods 55, 56, and 65, and rollers 25, 26, and 27 are all represented as in Figs. 1G and 11, and the paper is formed and pasted into a tube around the former 71, as before described. This former 71 ends abruptly at 72. From here on the former,with its tuck-recesses, is omitted, and in its'place is arranged a box in halves,73 and 74, hinged at 59 and 60, and held together at 61 and 62. This box is cut out inside, so as to conform to the front part of the former 50 and tuck-recesses 53 54, (seen better in section in Fig. 16,) thus making a dieshaped former. In front of the drawing-rolls 76 and 77, at 69, the hollow former 73 and 74 conforms to the shape of a tucked tube, Fig. 1, Sheet 1, fitting this tube outside. Inside theformer71, Sheet 3, Figs. 14 and 15, is a pipe, 78, communicating with a fan, (not shown,-) by means of which air can be pumped into the die-shaped former 73 74. W`hen the paper tube made on the former 71 is drawn through the former 73 74 and passed to the rolls v76 and 77, and air is IIO driven inside the paper tube, it will be distended, and will thus conform to the shape of the die-shaped former, thus delivering a tucked tube, as desired.

In order to make a partiell;r air-tightjoint between the former 7l and hollow former 73 74, elastic stri ps 7 9,0f leather or other material, are fastened to halves 73 and 74, which bear on the paper as it enters the dieshaped former.

By still another modification this die-shaped former will produce a tucked tube, as desired. Fig. 17 is a section of this modification. Here a dieshaped former, S() and Sl, in halves, is hinged and held, as before described. In length and position it is similar to the dieshaped former 73 7 4, Figs. 14 and l5. Instead of making the former S0 8l, Fig. I7, solid outside ofthe internal tube-recess, 82, it is made hollow, as at 88 and 84, and the tube-recess 82 is surrounded by a perforated former, S5, the holes being shown at 86 86, thus makinga dieshaped former. A' pipe, 87, communicating with a fan, (not showm) permits the nir to be exhausted from the box 83 and 84, thus drawing the paper tube closely to the die-shaped former and producing` a tucked tube in a sirnillar manner as that described before.

We do not confine either of our claims to the particular form shown of any of the devices or combinations described. XVe find by actual test that the described formers admit of various niodiications in section and in length, and the constrncter may change the proportions and appearance of many of the parts Without affecting the substantial identity of the invention.

IVe do not herein claim a hollow former operating without any aid from pneumatic pressure to give a tucked shape to a paper tube drawn through that former, because such a former is the subject of an application of XVilliani A. Lorenz for Letters Patent of the United States of America, iled .I une 16, 188i, Serial No. 134,991.

XVe cla-iin as our joint invention- 1. A former for making tucked paper tubing, constructed substantially as described, and combined with pneumatic mechanism, substantially as described, for forcing the Walls of the tubing into substantial conformity with the shape ofthe former.

2. The combination of the former having the pipe 34 and the openings and 36, with mechanism for exhausting air from that pipe.

3. The combination ot' a former having a rectangular ungrooved part corresponding in cross-section with the untucked paper tube formed thereon, with' the rolls 1S and 19, for guiding the paper to the former, and for detining the two lower corners or the reetangu lar untucked paper tube, all substantially as described.

4t. The combination of a former having a rectangular ungrooved part corresponding in cross-section with the untucked paper tube formed thereon, with the inclined apron Il, joined to that former at the curved surfaces 15, I6, and 17, and with the rolls 1S and 1.9,for guiding the paper from the apron to the loriuer, and for detining the two lower corners ot' the rectangular untucked paper tube, all substantially as described.

\VILI.IAI A. LGRENZ. WILLIAM II. HQNlSS.

IVitnesses:

ALBERT H. VALKER, JOHN P. Guanti.

lll 

